When it comes to brands and product lines, basically those famous Hong Kong have Guangzhou, and so do the big cities in China. However, compared with toy stores in Guangzhou, a certain style is always put on the shelves earlier and removed later. Therefore, it is an option to pay attention to "styles not available in the mainland" when purchasing.
Another option is those products that are not well-known in Hong Kong but have advertisements. For example, Moon Sand and Animals vs Soldiers. But these are older toys.
1-2-year-old children's toys are actually sold in similar places. What should be paid attention to is not the style and origin, but whether it meets the safety standards.
If you really want to recommend some, then recommend the morning education machine, teddy bear, Mr. Potato.